Texas Irrigation Technician Exam with Complete
Solutions
Backflow CORRECT ANS-The UNDESIREABLE reverse flow of water in a piping system
Back pressure CORRECT ANS-Condition that can happen due to elevation pumps, pressure
Back siphonage CORRECT ANS-backflow due to a sub atomic pressure (break in city main,
fire hydrant being used
Backflow prevention CORRECT ANS-A mechanical means to prevent a backflow
A backflow device CORRECT ANS-Any approved device that prevents an undesireable
reversal of flow of water
1 column foot of water CORRECT ANS-.443 psi (pretty close to 5 ft.
1 psi CORRECT ANS-requires a column of water 2.31 feet tall (or 3 ft.) (or 27.75 in.)
max flowrate for 1/2 in pipe (to stay below 5 fps) CORRECT ANS-5 gpm
max flowrate for 3/4 in pipe (to stay below 5 fps) CORRECT ANS-10 gpm
max flowrate for 1 in pipe (to stay below 5 fps) CORRECT ANS-15 gpm
max flowrate 1 1/4 in. pipe (to stay below 5 fps) CORRECT ANS-25 gpm
max flowrate for 1 1/2 in pipe (to stay below 5 fps) CORRECT ANS-35 gpm
, Texas Irrigation Technician Exam with Complete
Solutions
Key requirement for RPZ backflow CORRECT ANS-minimum of 12" above grade
Key requirement for Double Check backflow (DCVA) CORRECT ANS-If installed below
grade, Test cocks must be plugged with non-ferrous (non-magnetic) material
Key requirements for PVB and SVB CORRECT ANS-Must be 12" above highest head, valve,
pipe, fitting, or fixture
Key requirements for Air Gap CORRECT ANS-The recieving pipe must be 1" wider or 2
times bigger than the discharge pipe
zone flow CORRECT ANS-how many gallons go through a zone
Backflow Prevention Assembly CORRECT ANS-Any assembly used to prevent backflow into
a potable water system. The type of assembly used is based on the existing or potential
degree of health hazard and backflow condition.
booster pump CORRECT ANS-increases operating pressure
Bushing CORRECT ANS-The method of adapting a fitting to either a larger or smaller size.
Check Valve CORRECT ANS-A valve that allows flow in one direction but prevents flow in
the opposite direction.
Completion of irrigation system CORRECT ANS-All standards are met and the irrigator is
satisfied
Solutions
Backflow CORRECT ANS-The UNDESIREABLE reverse flow of water in a piping system
Back pressure CORRECT ANS-Condition that can happen due to elevation pumps, pressure
Back siphonage CORRECT ANS-backflow due to a sub atomic pressure (break in city main,
fire hydrant being used
Backflow prevention CORRECT ANS-A mechanical means to prevent a backflow
A backflow device CORRECT ANS-Any approved device that prevents an undesireable
reversal of flow of water
1 column foot of water CORRECT ANS-.443 psi (pretty close to 5 ft.
1 psi CORRECT ANS-requires a column of water 2.31 feet tall (or 3 ft.) (or 27.75 in.)
max flowrate for 1/2 in pipe (to stay below 5 fps) CORRECT ANS-5 gpm
max flowrate for 3/4 in pipe (to stay below 5 fps) CORRECT ANS-10 gpm
max flowrate for 1 in pipe (to stay below 5 fps) CORRECT ANS-15 gpm
max flowrate 1 1/4 in. pipe (to stay below 5 fps) CORRECT ANS-25 gpm
max flowrate for 1 1/2 in pipe (to stay below 5 fps) CORRECT ANS-35 gpm
, Texas Irrigation Technician Exam with Complete
Solutions
Key requirement for RPZ backflow CORRECT ANS-minimum of 12" above grade
Key requirement for Double Check backflow (DCVA) CORRECT ANS-If installed below
grade, Test cocks must be plugged with non-ferrous (non-magnetic) material
Key requirements for PVB and SVB CORRECT ANS-Must be 12" above highest head, valve,
pipe, fitting, or fixture
Key requirements for Air Gap CORRECT ANS-The recieving pipe must be 1" wider or 2
times bigger than the discharge pipe
zone flow CORRECT ANS-how many gallons go through a zone
Backflow Prevention Assembly CORRECT ANS-Any assembly used to prevent backflow into
a potable water system. The type of assembly used is based on the existing or potential
degree of health hazard and backflow condition.
booster pump CORRECT ANS-increases operating pressure
Bushing CORRECT ANS-The method of adapting a fitting to either a larger or smaller size.
Check Valve CORRECT ANS-A valve that allows flow in one direction but prevents flow in
the opposite direction.
Completion of irrigation system CORRECT ANS-All standards are met and the irrigator is
satisfied
